Programatically set the ToggleButton style within a treeviewitem

Does anyone know a way to set t开发者_开发技巧he style of a ToggleButton within a treeview item please?

As in something like treeviewItem.ToggleButton.Style = "Blah" if you see what I mean.

Many thanks.

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should be like this.

mytogglebutton.Style = CType(TryFindResource("MyToggleButtonStyle"),Windows.Style)